Where can I download a Catalina 10.15.7 installer?
That's it ........... where can I download a Catalina 10.15.7 installer to do a clean install on my 2012 Mac mini?
Mac mini, macOS 10.14
Try this
https://itunes.apple.com/us/app/macos-catalina/id1466841314?ls=1&mt=12
You can sometimes find it using the App Store, depending on your OS.
Or there is the MDS application for system deployment. It’s free for basic downloads.